They are images generated by a computer which in theory can only be identified by a human. The human has to enter the characters in the image to proceed.Originally Posted by whiteHz
If they are not very good, you can use an OCR program to recognize the characters instead of a human. Usually though only humans can 'decode' them.
I'm not describing any specific bug - i'm just saying that if the web application has flaws, you could find ways around using the captcha. This is unlikely.-Can I find the "bug" that you are describing?
If you are intelligent and a fast learner? Yes.Final question:
There must be a million people out there looking for holes like this! Is it worth being one?
If you are at or below average intelligence, forget it. There are millions of people learning about computer security these days and it takes more than a smile to get to the top. In other words if you are not smart, you have no place learning about computers.